This current fulfils all the requirements of our argument. It would naturally land emigrants from Malaysia on the coast of Central America between 10° and 14° north latitude. The most ambitious of Sea Migrations in early times are perhaps those of the Polynesians. Starting, it is assumed from their own traditions, from Samoa, their present distribution over the Southern Pacific shows that they did not hesitate to make immense sea journeys under circumstances which to our modern minds seem almost impossible. For the Polynesians had no boats but the open canoe or dug-out still used by the islanders to-day. These Polynesian migrations are fact, not theory; and thus when we come to reflect upon the problem of a migration from, say, Java to Central America, we begin to see how really practicable it all is. For the ships in the East were not dug-outs, but were actually built of planks. The Chinese traded with India and the Malaysian islands during the fifth and sixth centuries, and used decked boats for the trade. They knew of the compass from the earliest times, and actually used it for navigation from the third and fourth centuries onward. From them the peoples of India and Malaysia learnt shipbuilding, if they had not already developed it. Thus our migrating architects would, in all probability, have quite decent-sized vessels in which they could make the voyage to America. But it may be asked what impulse to migration these peoples could have had. If our dates are accurate, the case is a fairly clear one. Buddhism started, as every one knows, in India. During the fourth and fifth centuries the persecution of the Buddhists began, and ended finally in their being driven out of India. As an early result of the movement which was bringing about their expulsion, they established themselves in Burma. Buddhism was acknowledged in China, as the third religion of the Empire, as early as 65 A.D. The religion spread into the Indian Archipelago soon after it reached Burma and the Malay Peninsula, and the building of the Buddhist Temple at Boro Budor in Java was begun between 600 and 700 A.D., though, owing to wars and invasions, it was not finished until about 1430.